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Finding the Fourth Proportional to 668.23, 1,002.70 and 448.31

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Solution

The fourth proportional to 668.23, 1,002.70 and 448.31 is: 672.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    668.23 : 1,002.70 = 448.31 : x
  2. Step 2: Convert to fraction form
    668.23/1,002.70 = 448.31/x
  3. Step 3: Cross multiply
    668.23x = 1,002.70 × 448.31
  4. Step 4: Simplify right side
    668.23x = 449,520.98
  5. Step 5: Solve for x
    x = 449,520.98/668.23
  6. Step 6: Final answer
    x = 672.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.